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4139 Invertible Ratchet Handle (30 Teeth) – ½” Drive
4139 Invertible Ratchet Handle, 30 Teeth, 1/2″ Drive | Heavy-Duty Ratchet
- 4139 Invertible Ratchet Handle, 30 Teeth, 1/2″ Drive
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4139 is a 1/2″ drive invertible ratchet handle designed for reliable daily service operations. Its 30 Teeth mechanism supports stable torque transfer and directional flexibility, making it suitable for automotive and industrial maintenance workflows where durability and control matter.
| ITEM NO. | TEETH | D (mm) | T (mm) | DIN N．m | L mm/inch |  g |  pcs |
|---|---|---|---|---|---|---|---|
| 4139 | 30 | 43 | 22.5 | 512 | 275mm/10-7/8" | 600 | 5 |
Feature
- Invertible ratchet design for fast direction switching in service work.
- 30 Teeth mechanism balances durability and dependable engagement.
- 1/2″ drive platform aligns with mainstream heavy-use socket systems.
- Standards shown on page: DIN 3122 / ISO 3315 and DIN 3123 / ISO 3316.
- Portfolio clarity: keep naming format consistent as “Teeth” across all ratchet pages.
Q1. How many Teeth does 4139 have?
A1. 4139 uses a 30 Teeth ratchet mechanism.
Q2. Is 4139 a 1/2″ drive ratchet handle?
A2. Yes, it is a 1/2″ drive model.
Q3. What does “invertible” mean on 4139?
A3. It indicates a reversible/invertible ratchet function for direction change during tightening and loosening.
Q4. Which standards are listed for this model?
A4. The page lists DIN 3122 / ISO 3315 and DIN 3123 / ISO 3316.
Q5. What is the difference between 4139 and 4181?
A5. Both are 1/2″ drive 30-Teeth family items; 4181 is listed as quick-release reversible, while 4139 is listed as invertible.
Q6. Can this be used with impact tools?
A6. No—use as a hand ratchet only; avoid powered impact operation.
